Emilio Cobos Álvarez 6c211da0ae Bug 1582374 - Add a warning when we find usage of the CSS zoom property. r=smaug,flod ...

Now that we count them, I think we should do this.

This property is pretty painful for various reasons:

 * It's a pretty awkward non-standard property.
 * Has a pretty short name, so people use it instead of the standard
   alternatives.
 * We cannot really even implement it easily anyhow, without breaking a whole
   bunch of stuff, because pages do things like:

```
myelement {
  zoom: 0.5;
  -moz-transform: scale(0.5);
  transform-origin: 0 0;
}
```

For now this is only recorded when CSS use counters are enabled (Nightly for
now), but I want to change it once bug 1578661 is in central.

The hope is that this warning slightly raises awareness of this property not
being standard. You get a CSS parsing error in the console, but those are
usually too noisy and disabled by default.

Differential Revision: https://phabricator.services.mozilla.com/D46430

--HG--
extra : moz-landing-system : lando

2019-09-20 01:31:35 +00:00

..

en-US/chrome

Bug 1582374 - Add a warning when we find usage of the CSS zoom property. r=smaug,flod

2019-09-20 01:31:35 +00:00

jar.mn

…

moz.build

…